Grinding machine



Patented Jim.' 3,j 1922.

Huma-SHEET n gwwmtw C. v.,A'LQU|sT. 'GRINDING MACHINE.. .APPLICATIQN FILED MOV. 2| 1920.

c.v.ALQU1sT.

GRINDING MACHINE.

APPLICATION FILED NOV. 2, 1920.

Patented Jan. 3, 1922.

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w@ a w Mib L w@ L i mi quid c. v. ALQUrsT. GRINDING MACHINE.

APPLICATION FILED NOV-2, 1920.

Patented J an. 3, 1922.

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C. V. ALQUIST. GRINDING MACHINE. APPLICATION man N ov. 2. 1920.

Patented Jan. 3,1922.

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fication.

earanrforrica.

V. AL-Q'U'IST, 0F NGRWICH, CONNECTICUT.

GRINDING MACHINE.

To all whom t may concern Be itflinown that L CHARLES' V. ALQUIs'i,

a citizen of the vUnited States, residing at j Norwich, fin'thefcounty of New London and State of Connecticut,y have invented new and useful Improvements in .a GrindingA Machine, of which lthe following isa speci- This invention `relates to grindingmachines of the class wherein provision is made for grinding two `sides of an object simultaneously, and has for one of its objects to improve and simplify theconstruction and of this character. y

v Another object of the invention `is to provide a device of this character which may be "attached `without material structural change', to planers and like machines of yvarious forms :and sizes. l Y

With these and other objects in. view, the invention consists in certain novel features of construction as hereinafter shown and described and then specifically pointed out in the Claim,and in the drawings illustra# tive of the preferred embodiment ofthe in@ vention."

`Figure 1 is a side elevation of a portion e of a conventional planer with the improve- 30 i ments applied.

"Fig 2 is a planview:

- Fig. 3 isa front elevation, and

AFigi. `{lf is a rear elevation, of theparts shownin Fig. il. 1 Y Fig. 5 isy an enlarged' vertical section of the {head portion of the improved device.

Fig. 5' is a: section kon the line 6--6 of Fig. 5.

` Figa'l` 7 `is an enlarged section ofthe idler housing, on the line 7-7 of Fig. 2.

Fig.' 8 is an enlarged section on the line 8;-'8 of Fig'. 1. f

4 The improved device is' designed'fmore particularly for expediting the finishing of the splines or grooves in broachesand like grindingor reaminp; tools, but is not neces sarily limitedto this specific object, and it is not desired toflimit the invention uin this respect..

` For the purpose of illustration, the proved device is shown applied to a conventionalplaner, in which 1.0 represents the Y Specification of Letters Patent.

` Application led 1\lovember 2, 1920. Serial No. 421,230.

increase the eliciency and utility of'devices j 22 rotatable by ahand wheel 23.'

y .Patented Jan. a, i922.

` bedyll the side framesand 12 the transverse head support, of the usual construeV tion.

Attached to or 'integral with the head member 12 isa vvertical plateflt having dovetailed edges to slidably receive another plate 15', the latter being adjustable verti` cally onrthe member 14 by a vertical screw indicated at 16, and provided with a turningf head 17. y

Attached as by cap screws 18 to the plate 15 isa hanger member 19 having lateral extensions 20theA latter .having bearing lues 21 at the ends to'receive an adjusting screw The member 19 together with its exten sions 2O is formed with a continuous dovetailed rib 24 on whichbracket devices 25 having dovetailed sockets are slidably dis`l posed.

Each of the brackets 25 is provided with a threaded lug 26 in which the screw 22 operates, the screw having righty and left handed threads, so that as the screw is rotated by its hand wheel 28, the brackets 25V will be adjusted-toward or awav from each other according as the screw is rotated to within the longitudinal bore adjacent the outer ends ofthe sleeves 31 are bearing rings 32gfor bearing balls 33, the rings coacting with similar and reversely disposed bear-A ingrings'. Y

The head ymember 29 is provided with shaft supporting devices. and extending through these devices and likewise through the head member 29 is a.l spindle 35. A collar 36 surrounds the spindle at its upper end, the latter reduced at the lowerend to form a seat for a bearing ring 34.

The upper end ofthe spindle 35fis threads' ed to kreceive a take up nut 37, the latter split and providedwith a clamp bolt 38 to enable the nut to be rigidly coupledto the spindle in adjusted position.

Bearing upon the head member- 29 at its upper kand lower ends are bearing collars 39 Vand 40, the'collar 39 is reduced to bear upon in position respectively by cap screws 42 y.

and 43. ,Y g Y Disposed within the long1tud1nal bore of the member 29 at its lower end is a bearing ring '44 for bearing balls 45, the ring 44 coacting with a similar bearing ring 46, as shown. :v

Mounted on-the spindle having an annular lip 48 at the lower end to support the inner bearing ring-46'.V Y Y The bearing collar 40 is formed with an upwardly directed flange 49'to engage in a seat in the sleeve 47, as shown in'Fig. 5.

shoulder 50 to support the sleevey47, andis likewise provided with an integral -stpp col'- lar 51 spaced from itsV lower end'with the part of the spindle in advance oit' the latter Ycollar threaded to receive the )abrading element, forinstance a grinding wheel 52V of emery or Vthe like and held in position on the spindle' by lock nuts r53.

Attached, rinany suitable manner tothe head member 29 is a cover plate 54to close the transverse bore. Y

Mounted onV the spindle v35 within the .transverse bore, of the head member 29 and between, the Sleeves 31 and 47, is a belt pulley 55, being preferably locked from movemen on the spindle as by a clamp screw 56.

ported in each bracket isa stud V59. ySup-- ported upon Athe Vouter endV of each stud is a rearwardlv opening yoke 60. Disposed within each lyoke is a bearing collar' 6l, and held from turning in the yokcs-by combined centering and supporting screws 62. A drive Ashaft v63 is mounted for rotation through'` the collars 6l and is provided with a loose belt pulley 64 and-a tight'belt pulley 65.

VExtending from each of the yokes is4 an arm 66 through which a .belt shifter rod 67 is slid ably disposed, the rod having a fork member, 68 to engagethe drive belt 69. VBy this means the motion of the belt 69 may be impartedto ythe' shaft 63, or disconnected therefrom as will. beobvious. Y

Y Formed through eachside member 1ll of the frame is an opening, one of which 1s represented at 7 O in Fig. 8, each opening being surrounded by anoutwardly directed flange.

7l, and bearing upon each llange and over the opening is a closure disk 72.

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Disposed internally of the frame sides 1l and extending over theV openings 70 are other disks, one of which is shown at 7 3 in 8,

and provided with stop lugs 74 each having aseat to engage thefadjacent inner edge of the opening 70. Clamp bolts 75' are passed through the two disks71 'and 72 and bind them firmly in position uponlthe frame sides 11, while at the same time Vthedisks mayfbe adjusted rotatably by vloosening the 'clamp bolts 75, as will be obvious. l

Each'of the disks 73 ris ,provided with la bearing, one of which is shown at 76, tou-.eceivea shaft 77.V

Mounted to swing upon the shaft 771 are housing` members yeach 'including vertical spaced sides 78 and a connecting vtop member i 79. A'shaft '8O Vis supported at lits-ends rin the side portions 78, Vand mountedfor rotar Y tion upon each shaftjbetween the spaced -VThe spindle 35 is formed withV ast-op sides :is'an idler roller 8l, preferablywith roller bearings 82, as shown, to reduce the friction.r y Y,

Mounted on the shaft 63 is a relatively longdrum or belt pulley 82, and extending "respectively around'the drum 82 and around the small belt pulleys 55fon the spindles '35, are; drive belts 83, the belts being necessarily `given a half twist in passing from the hori- Y zontally mounted 'drum 82 to the vertically ,mounted pulleys 55. Y'

v 'In passing beneath the idler pulleys v81, the latter operate to hold the belts together `so that they pass without Yfriction through the contracted spaces within the tubular journals28 and'heads 29." A

By this means two Vdistinct Vand separate grooves or splines mayA be simultaneously operated Vfrom opposite sides, for instance from'opposite sides of a broach or like cut-v ting tool or implement, land the cutting elements Sand the element being acted on heldV in exact and true position, -so that-the splines will be exactly alike on each side. Moreover the abra'ding or' cutting disks 52 operating in position and prevent lateraldisplacementv said guidewa-ysand having laterall exten'V 1 sions, coacting bracketsvslidable on-saidextensipns, a tubular head for eaehofusaid' i with equal force at opposite sidesof the elebrackets and each having a tubular bearing mounted on jsaid support and carrying a belt engaged respectively by the brackets, means pulley, and a drive belt operating through p for adjusting said brackets toward and away each of said tubular bearings and around 10- from each other, a spindle for an abrading said pulleys.

5 element mounted for rotation in each of said In testimony whereof, I affix my signature tubular heads, a belt pulley carried by said hereto. spindle Within said head, a drive shaft g CHARLESr V. IVXLQUIST.` 

